JPH0742017U - Waterproof coupler structure - Google Patents

Abstract

(57) [Abstract] [Purpose] When the male coupler, which is a male-female fitting type connecting member, has a waterproof structure, a reliable connection is required when the coupler body, the grommet, and the cover body are assembled in a laminated form. It can be so. [Structure] A small-diameter projecting portion 6j is formed at the tip of a projecting portion 6h projecting from the split type coupler body 6, and a cover body 8 is formed with the coupler body 6 assembled with a terminal 9 and a grommet 7. The waterproof coupler structure in which the cover body 8 comes into contact with the step portion 6i between the projecting portion 6h penetrating the grommet 7 and the small diameter projecting portion 6j when the through coupling is performed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a waterproof coupler structure for waterproofing a male / female coupler connecting portion.

[0002]

[Problems to be Solved by Prior Art and Invention]

 Generally, female couplers formed in this type of casing (housing) are fitted with male couplers to which external connection lead wires are connected. Some of these require a waterproof function. There is something to be done. However, this requires waterproofing between the male and female couplers and waterproofing between the male-side coupler and the lead wire for external connection. Therefore, conventionally, as shown in FIG. A groove (waterproof ring, gasket) 12 is externally fitted to the groove 11a formed on the outer circumference to measure the waterproofness between the female side coupler 13 and the external connection lead wire 10 between the male side coupler 11 and the male side coupler 11. Was inserted through the grommet 14. However, with this type, the number of grommets increases according to the number of external connection lead wires, the number of parts increases, and the space for accommodating the grommets must be secured in the male coupler, and the coupler itself There is also the problem of increasing the size.

In view of this, a male coupler is constructed by assembling the main body of the coupler for holding external connection lead wires and terminals, a grommet, and a cover body in a laminated form, and waterproofing the lead wire with the female coupler with one grommet. It is proposed that the grommet be elastically deformed when the cover body is inserted to insert the male coupler into the female coupler. In this state, it works on the coupler body, the clear feeling of insertion is impaired, the cover body is insufficiently inserted, and there is a risk of poor connection, resulting in a decrease in reliability.

[0004]

[Means for Solving the Problems]

 The present invention was devised with the object of providing a waterproof capra structure capable of eliminating these drawbacks in view of the above-mentioned circumstances, and in which a male coupler is fitted in a female coupler. The male coupler is water-tightly pressed against the inner peripheral surface of the female coupler and the coupler body that holds the lead wire and terminals for external connection, and the lead wire for external connection penetrates in a water-tight manner. The grommet and a cover body that is placed on the outer surface of the grommet and penetrates the lead wire for external connection are assembled in a laminated structure, and the coupler body is provided with a grommet. The present invention is characterized in that a projecting portion that is inserted in a watertight manner is formed in a projecting manner in a hole portion provided so that the tip of the projecting portion abuts the cover body.

With this configuration, the present invention makes it possible to perform waterproofing of the male and female couplers, waterproofing of the external connection lead wire and the male side coupler, and reliable connection with one grommet. It is a thing.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, reference numeral 1 denotes a casing, and a female coupler 2 having a cylindrical peripheral wall 2a is integrally formed in the casing 1, and is connected to an internal wiring lead wire 3 in the female coupler 2. The terminal 4 is assembled, and the locking projection 2b is formed on the outer periphery of the peripheral wall 2a.

On the other hand, 5 is a male coupler which is inserted into the female coupler 2. The male coupler 5 is composed of a coupler body 6, a grommet 7 and a cover body 8. There is. The coupler body 6 is made of a hard insulating resin material and is formed into a substantially cylindrical shape, but is formed by connecting substantially half symmetrical split mold halves 6a and 6b through a connecting portion 6c. In each of these half portions 6a, 6b, a terminal groove 6d into which a terminal 9 connected to the terminal 4 in the female coupler 2 is inserted, and the terminal 9 and an external connection for connecting the terminal 9 are formed. Connection grooves 6e into which the connection portions with the lead wires 10 are inserted are formed respectively. Then, in the coupler body 6, the half portions 6a and 6b are butted together so that the connecting portion 6c is bent, and the projection 6f formed on one half portion 6a is fitted into the hole portion 6g formed on the other half portion 6b. As a result, the terminal 9 and the lead wire 10 are assembled in the assembled state. Further, a cylindrical protrusion 6h is formed on each of the half portions 6a and 6b in the outward direction opposite to the insertion direction of the male coupler 5 into the female coupler 2. A small-diameter protruding portion 6j is formed at the tip of the protruding portion 6h via a step portion 6i.

On the other hand, the grommet 7 is formed into a substantially cylindrical shape by using a rubber elastic material, and the grommet 7 has a rib portion 7a formed on the outer peripheral surface thereof in pressure contact with the inner circumference of the peripheral wall 2a. A lead wire hole 7b through which the lead wire 10 penetrates in a watertight manner and a projection hole 7c through which the above-mentioned projection 6h penetrates in a watertight manner are formed. The grommets 7 are assembled in the assembled coupler body 6 by inserting the protrusions 6h into the protrusion holes 7c while the lead wires 10 penetrate the lead holes 7b. Although it is held, the outer surface of the grommet 7 and the stepped portion 6i are set to substantially match with each other in the assembled state.

The cover body 8 is formed of a hard insulating resin material into a disk shape. The cover body 8 has a lead wire hole 8 a through which the lead wire 10 penetrates and the grommet 7. A small-diameter hole 8b is formed in which the small-diameter projection 6j protruding from the outer surface is fitted but the projection 6h is not fitted. Then, the cover body 8 is assembled and held by being fitted to the outer surface of the grommet 7 in a state where the lead wire 10 and the small-diameter protruding portion 6j are fitted into the holes 8a and 8b and positioned, and in this state, The cover body 8 comes into contact with the stepped portion 6i. Further, the outer peripheral edge portion of the cover body 8 has a gap for fitting the peripheral wall portion 2a between the cover body 8 and the grommet 7, and the coupler main body has a gap. The locking hole 8c is formed to extend toward the 6 side, and the locking hole 8c is locked to the locking protrusion 2b formed on the peripheral wall 2a, whereby the casing of the male coupler 5 is formed. It has a configuration that can be incorporated into 1.

In the embodiment of the present invention configured as described above, the male coupler 5 is formed by assembling the lead wire 10, the coupler body 6 holding the terminal 9, the grommet 7, and the cover body 8 in a laminated manner. And, one grommet 7 is waterproof against the female coupler 2 and waterproof against the lead wire 10, and prepares a grommet corresponding to the number of lead wires as in the conventional case. There is no need, and the number of parts can be reduced and the coupler itself can be made smaller (smaller diameter).

As described above, in the embodiment of the present invention, the male coupler 5 is constructed by assembling the coupler body 6, the grommet 7, and the cover body 8 in a laminated manner, and then pressing the cover body 8. Although it can be inserted into the female coupler 2 with, the cover body 8 is incorporated and held by being inserted into the small-diameter protruding portion 6j formed at the tip of the protruding portion 6h protruding from the coupler body 6. Then, the cover body 8 can be fitted into the female coupler 2 by inserting the cover body 8 until the engagement hole portion 8c is engaged with the engagement protrusion 2b. 6i and the coupler body 6 is directly pushed in via the protruding portion 6h. As a result, the grommet 7 is formed in a laminated shape so as to be sandwiched between the male coupler 5 and the male type coupler 5. Difference of female coupler 2 A feeling of being plugged in becomes clear, and the male coupler 5 can be connected without causing a defective insertion.

It should be noted that the present invention is not limited to the above-described embodiment, and for example, the coupler body is not limited to the split type, but may be an integrated type. .

[0013]

[Operation effect]

 In short, since the present invention is constructed as described above, the male coupler is constructed by assembling the coupler body holding the external connection lead wires and terminals, the grommet, and the cover body in a laminated form. A single grommet is used for waterproofing between the male and female couplers and between the male coupler and the lead wires, providing a grommet corresponding to the number of conventional lead wires. It is possible to reduce the number of parts and reduce the size (smaller diameter) of the coupler itself. In addition, the cover body assembled on the outer surface of the grommet is incorporated and held in contact with the tip of the protrusion protruding from the coupler body so as to penetrate the grommet, and as a result, the cover body is pushed in. When the male coupler is fitted into the female coupler with, the coupler body is not a grommet having rubber elasticity, but is directly pushed by the cover body through the protruding portion. The feeling of insertion of the male coupler into the female coupler is clear, and the male coupler is not improperly inserted.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a waterproof coupler.

FIG. 2 is a partially cutaway sectional view of a waterproof coupler.

FIG. 3 is a partial cross-sectional view of a waterproof coupler.

FIG. 4A is a front view of the coupler body, and FIG. 4B is a sectional view of the coupler body.

5A is a front view of the grommet, and FIG. 5B is a partially cutaway sectional view of the grommet.

6A is a front view of the cover body, FIG. 6B is a plan view of the cover body, and FIG. 6C is a side view of the cover body.

FIG. 7 is a partially cutaway side view of a conventional waterproof coupler.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Female coupler 2b Locking protrusion 3 Internal wiring lead wire 4 Terminal 5 Male coupler 6 Coupler body 6a Half part 6c Connecting part 6d Terminal groove 6e Connection groove 6h Projection part 6i Step part 6j Small diameter projecting part Part 7 Grommet 7a Rib part 7b Lead wire hole 7c Projection part hole 8 Cover body 8a Lead wire hole 8b Small diameter hole 8c Locking hole part

Claims (1)

[Scope of utility model registration request] 1. A male coupler to be inserted into a female coupler, wherein the male coupler is a coupler body for holding lead wires and terminals for external connection, and a water-tight seal on the inner peripheral surface of the female coupler. A structure in which a grommet which is pressure-contacted and through which an external connection lead wire penetrates in a watertight manner and a cover body which is applied to the outer surface of the grommet and through which the external connection lead wire penetrates are assembled in a laminated form. In addition, the coupler body is formed with a protruding portion projecting in a watertight manner through a hole formed in the grommet, and the tip of the protruding portion abuts the cover body. Waterproof coupler structure featuring.